A new strat found by The8bitbeast that works in all versions of Crash 1, 2 and 3.

You alternate between diagonals on the DPad (or analog) every active frame (ex. up-left -> down-right) while jumping to build up backwards speed, which you then release by just holding the opposite direction to the one you want to go.

Currently TAS only, unless someone can figure out an RTA way of doing it (by pause buffering or something).

Even if this was possible in RTA, I feel like I'd get a headache just watching myself do it. x_x